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A capacity utilization of less than 70 percent is dangerous and could trigger vicious competition, Chen warned.

"On the one hand you could say it underscores the unbelievable complexity of the U.S.-China relationship," but "what you do not want is for the discussions of the meeting to become so crowded that the bigger picture gets lost," he said.

The two presidents had very good discussions in a uniquely informal atmosphere, Tom Donilon, Obama's national security advisor, told a press briefing after the summit.

BEIJING, April 3 (Xinhua) -- China appreciates an EU decision to delay the enforcement of the Emissions Trading System (ETS) for international flights to and from Europe, a Foreign Ministry spokesman said Wednesday.

BEIJING, May 26 (Xinhua) -- Meteorological authorities issued a yellow alert on Sunday for rainstorms in south China that will last from Sunday to Monday.